Table 3b. Decay Characteristic of Solvent Response Function, C(t), of C-480 in the Presence of Pure 12-4(OH)-12 and 12-4(OH)-12 at Various Concentrations of Urea.

urea (M)	a1s	τ1s (ps)	a2s	τ2s (ps)	⟨τs⟩ (ps)	Δν (cm–1)
0.0	0.68 ± 0.01	355.43 ± 0.01	0.28 ± 0.01	1861.01 ± 0.08	762.76	1910
0.5	0.56 ± 0.04	297.45 ± 0.01	0.44 ± 0.04	1409.21 ± 0.25	786.62	1930
1.0	0.66 ± 0.02	347.02 ± 0.01	0.34 ± 0.02	1735.24 ± 0.17	819.01	2057
2.0	0.52 ± 0.03	337.47 ± 0.02	0.48 ± 0.03	1498.59 ± 0.13	894.81	1954
3.0	0.73 ± 0.02	371.56 ± 0.01	0.27 ± 0.02	1768.15 ± 0.16	748.64	1911
4.0	0.51 ± 0.01	262.44 ± 0.01	0.49 ± 0.01	1230.69 ± 0.02	736.88	2098
5.0	0.67 ± 0.01	175.85 ± 0.01	0.33 ± 0.01	1350.64 ± 0.03	563.53	2366

^aΔν = ν(0) – ν(∞).